Dermatillomania

i suffer from a severe (* well in my opinion) form of lip picking. i didn't even know it were called lip picking and dermatillomania, just recently discovered this. i always thought it was a very bad habit, thats all. i constantly and non stop remove the skin of my inner lips and cheeks with my hands, untill there is no skin left and its raw and red and bald and sometimes i draw blood, but i continue, i never let it heal. i'm afraid i will cause real damage to the nerves, but even this cannot stop me from doing it. plz, plz help me anyone. tell me what i can do to stop this.